Abstract: A head-set apparatus for training a horse including an enclosure frame for receiving the horse and a linear member, having connector means at each end, one of the connector means being detachably connected to the horse's head harness, while the other connector means is detachably and adjustably connected to some portion of the frame for holding the horse's head in a desired attitude. The head-set apparatus may include one or two arm members, preferably mounted upon the frame for movement fore and aft, the linear member connecting the horse's head to the arm members. The arm member is preferably provided with means for biasing the arm member rearward against the forward pull of the horse's head through the linear member.